Texas A&M University (TAMU) HIST105 History of the United States Practice Exam

The concept central to the domino theory is the idea that neighboring countries could fall to communism like dominoes. This theory emerged during the Cold War, particularly during the 1950s and 1960s, as a way to justify U.S. intervention in foreign conflicts. It suggested that if one country in a region became communist, surrounding countries would likely follow, creating a chain reaction similar to a line of falling dominoes.

This perspective was particularly influential in U.S. foreign policy regarding Southeast Asia, especially in relation to countries like Vietnam, Laos, and Cambodia. The belief that the spread of communism in one nation could potentially lead to a broader regional shift toward communism was instrumental in justifying U.S. military involvement and support for anti-communist regimes in those areas. The domino theory underscored the urgency felt by U.S. policymakers to prevent the further spread of communism during the Cold War era.